ПОМИЛУЙ БОГ! old-fashInterjInvarfixed WO
(used to express the speaker's strong disagreement with or objection to some suggestion, idea, or question- usu. one voiced by the interlocutor) absolutely not, I am appalled that such a thing has been suggested, asked: (good) heavens, no!
goodness, no!how could you even say (think) such a thing!(in limited contexts) for God's (goodness*, heaven's) sake (, of course not)!not on your life!

Большой русско-английский фразеологический словарь 

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